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diff toolboxes/FullBNT-1.0.7/bnt/CPDs/@discrete_CPD/CPD_to_pi.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolboxes/FullBNT-1.0.7/bnt/CPDs/@discrete_CPD/CPD_to_pi.m	Tue Feb 10 15:05:51 2015 +0000
@@ -0,0 +1,13 @@
+function pi = CPD_to_pi(CPD, msg_type, n, ps, msg, evidence)
+% COMPUTE_PI Compute pi vector (discrete) 
+% pi = compute_pi(CPD, msg_type, n, ps, msg, evidence)
+% Pearl p183 eq 4.51
+
+switch msg_type
+  case 'd',
+   T = prod_CPT_and_pi_msgs(CPD, n, ps, msg);
+   pi = pot_to_marginal(marginalize_pot(T, n));
+   pi = pi.T(:);                   
+ case 'g', 
+  error('can only convert discrete CPD to Gaussian pi if observed')
+end